package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {

    @Autowired
    DishMapper dishMapper;

    @Autowired
    DishFlavorMapper dishFlavorMapper;


    @Autowired
    private SetmealDishMapper setmealDishMapper;


    /**
     * 新增菜品信息
     * @param dishDTO
     */

    @Override
    @Transactional
    public void addDishWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();

        BeanUtils.copyProperties(dishDTO,dish);

        //向菜品表中插入一条数据
        dishMapper.insert(dish);


        //获取insert语句生成的菜品的主键值
        Long id = dish.getId();

        //向口味表中插入多条数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors !=null && flavors.size()>0){
            //利用lambda表达式每次便利都为其设置id
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(id);
                    });

            dishFlavorMapper.insertBatch(flavors);
        }


    }

    /**
     * 菜品分页查询
     * @param dishPageQueryDTO
     * @return
     */

    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        //开始分页
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());

        Page<DishVO> page=dishMapper.pageQuery();

        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 菜品批量删除
     * @param ids
     */
    @Override
    public void deleteBatch(List<Long> ids) {
        //判断当前菜品是否是起售状态
        for (Long id : ids) {
           Dish dish=dishMapper.getById(id);
           if(dish.getStatus() == StatusConstant.ENABLE){
               //为起售状态则自定义的抛出异常
               throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
           }
        }

        //判断当前菜品是否被套餐关联了
      List<Long> setmealIds=setmealDishMapper.getSetmealIdsByDishIds(ids);
        if(setmealIds !=null && setmealIds.size()>0 ){
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }

        //删除菜品
        for (Long id : ids) {
            dishMapper.deleteByIds(id);
            dishFlavorMapper.deleteByDishIds(id);
        }

    }

    /**
     * 根据id查询菜品信息和对应的口味信息
     * @param id
     * @return
     */
    @Override
    public DishVO getById(Long id) {
        //根据id查询菜品信息
        Dish dish = dishMapper.getById(id);

        //根据id查询口味信息
        List<DishFlavor> dishFlavors=dishFlavorMapper.getByDishId(id);

        //将查询的信息封装到DishVO中
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);

        return dishVO;
    }

    /**
     * 修改菜品信息
     * @param dishDTO
     */
    @Override
    public void updateDish(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);

        //修改菜品表信息
        dishMapper.updateDish(dish);

        //删除口味信息
        dishFlavorMapper.deleteByDishIds(dishDTO.getId());

        //插入新的口味信息
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors !=null && flavors.size()>0){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
                    });
            dishFlavorMapper.insertBatch(flavors);
        }
    }
    /**
     * 根据分类id查询菜品
     * @return
     */
    @Override
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder().categoryId(categoryId).status(StatusConstant.ENABLE).build();
        return dishMapper.list(dish);
    }

    @Override
    public void openOrClose(Integer status, Long id) {
        Dish dish = Dish.builder().status(status).id(id).build();

        dishMapper.updateDish(dish);
    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }


}
